The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 05, 2000
Filed:
Jan. 04, 1999
Applicant:
Inventors:
Chester J Kitchen, Bensalem, PA (US);
Thomas F August, Glenolden, PA (US);
William L Ozanich, Bensalem, PA (US);
Michael J Telepchak, Yardley, PA (US);
Assignee:
United Chemical Technologies, Inc., Bristol, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B01D / ; B01D / ;
U.S. Cl.
CPC ...
428405 ; 2101983 ; 210282 ; 2105021 ; 210504 ; 210506 ; 210616 ;
Abstract
A treated silica composition particularly useful for solid phase extraction in chemical analysis, the silica having both phenyl and propylsulfonic acid functional groups; a cartridge for extraction which comprises the treated silica; a column for extraction which comprises the treated silica; and a method for solid phase extraction which uses the silica composition. A method for analysis of gamma hydroxybutyric acid is also disclosed which uses the treated silica.